Selective Scandium Elution from D2EHPA-Impregnated Ion-Exchange Resin After Metal Loading from Acidic Chloride
Eleni Mikeli1, Danai Marinos1, Efthymios Balomenos1
1Laboratory of Metallurgy, School of Mining and Metallurgical Engineering, National Technical University of Athens, Iroon Polytechniou 9 Str., Zografou Campus, 15773 Athens, Greece.
Materials (Basel, Switzerland)
|January 8, 2025
Summary
This study shows fluoride-based systems effectively elute scandium (Sc) from D2EHPA resins after extraction from acidic chloride solutions. Optimizing this elution step is key for efficient scandium recovery in industrial applications.
Area of Science:
- Hydrometallurgy
- Materials Science
- Chemical Engineering
Background:
- Di-(2-ethylhexyl) phosphoric acid (D2EHPA) resins exhibit high selectivity for scandium extraction from acidic solutions.
- Efficient scandium recovery is crucial for various industrial applications, necessitating optimized separation techniques.
Purpose of the Study:
- To investigate the elution behavior of scandium from D2EHPA-impregnated resins.
- To identify effective elution systems for selective scandium recovery from acidic chloride solutions.
- To demonstrate the feasibility of column-based elution for industrial scandium extraction.
Main Methods:
- Ion-exchange extraction of scandium using D2EHPA-impregnated resins from acidic chloride solutions.
- Evaluation of various elution systems for scandium desorption.
- Column-based elution experiments to assess efficiency and selectivity.
Main Results:
- Fluoride-based elution systems proved highly effective for scandium desorption.
- Complete and selective elution of scandium was achieved in a column setup.
- The study highlights the critical role of the elution step in scandium recovery.
Conclusions:
- Fluoride-based eluents are a promising strategy for selective scandium recovery from D2EHPA resins.
- Optimizing the elution process is essential for efficient industrial scandium extraction from chloride media.
- This research provides valuable insights for advancing scandium separation technologies.
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